Vue events

MyButtonCounter.vue

<template>
  <button v-on:click="clicked()">
    counter
  </button>
</template>

<script>
export default {
  data() {
    return {
      count: 0
    }
  },
  methods: {
    clicked() {
      this.count++;
      this.$emit("clicked",this.count);
    }
  }
}
</script>

<style>
</style>